LCD_MENU_SKETCH

#include <Bounce2.h>
#include <Wire.h>
#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27, 16, 2);
#define up 7
#define down 6
#define LED_PIN 13
unsigned int counter = 0;
unsigned long currentMillis;
unsigned long previousMillis;
int menuSize = 8;
int ledState = LOW;
bool mainMenu = true;
int currentMenu =0;
int subMenu = 0;

byte arrow[] = {
  B00000,
  B00100,
  B00010,
  B11111,
  B00010,
  B00100,
  B00000,
  B00000
};

byte degree[] = {
  B00000,
  B01110,
  B01010,
  B01110,
  B00000,
  B00000,
  B00000,
  B00000
};

byte celcius[] = {
  0x00,
  0x06,
  0x09,
  0x08,
  0x08,
  0x09,
  0x06,
  0x00
};

Bounce debouncerup = Bounce(); // Instantiate a Bounce object
Bounce debouncerdown = Bounce(); // Instantiate a Bounce object

void setup() {

debouncerup.attach(up,INPUT_PULLUP); // Attach the debouncer to a pin with INPUT_PULLUP mode
debouncerdown.attach(down, INPUT_PULLUP);
pinMode(LED_BUILTIN,OUTPUT); // Setup the LED
debouncerup.interval(50);
debouncerdown.interval(50); // Use a debounce interval of 25 milliseconds
lcd.begin();
lcd.backlight();
lcd.setCursor(0,0);
lcd.print("Incubator Is Now");
lcd.setCursor(0,1);
lcd.print("Starting...");
lcd.createChar(0, arrow);
lcd.createChar(1, degree);
lcd.createChar(2, celcius);
lcd.home();
delay(1000);
currentMenu = 1;
lcd.clear();


}

void loop() {
  currentMillis = millis();
  debouncerup.update(); // Update the Bounce instance
  debouncerdown.update();
  calculateMenu();    //decides to decrement or increment
  checkMenu();        //shows different text on lcd according to menu system
  updateSub();


}

//----------------------------------Functions-----------------------


void checkMenu() {

switch(currentMenu) {
case 0:
currentMenu = 1;
break;

case 1:  //shows temp and humidity default case
lcd.setCursor(0,0);
lcd.print("Temp: 35");

lcd.setCursor(0,1);
lcd.print("Hum: 50");

break;                                  //remember to turn mainmenu variable to false when getting into sub menus and change it back as you go into main menu
                    //this will help me differentiate between main menu and sub menu variables and also the counters.

case 2:  //Motor settings

lcd.setCursor(0,0);
lcd.write(0);
lcd.print("Motor settings ");
lcd.setCursor(0,1);
lcd.print(" LCD backlight");

break;                            //to execute a process. makea an if statement saying if the menu matches that number and select button is pressed. start the process

case 3:   //Stop motor

lcd.setCursor(0,0);
lcd.print(" Motor settings");
lcd.setCursor(0,1);
lcd.write(0);
lcd.print("LCD backlight");
break;

case 4:  //light setting

lcd.setCursor(0,0);
lcd.write(0);
lcd.print("Light settings   ");
lcd.setCursor(0,1);
lcd.print(" Time settings   ");
//add a up or down character to show the user that you can press up and down to change menu
break;

case 5:  //Time settings

lcd.setCursor(0,0);
lcd.print(" Light settings   ");
lcd.setCursor(0,1);
lcd.write(0);   //selected
lcd.print("Time settings   ");   //this goes into sub menu. make another sub menu switch case when select is pressed it should change into that sub menu and
              //when the down button is pressed for 5 sec it should take you back to home
break;

case 6:
currentMenu = 5;
break;


}
}

//--------------------Setting up led rate function--------------------

void ledRate() {
 if ( debouncerup.fell() ) {  // Call code if button transitions from HIGH to LOW
  lcd.clear();
  counter= counter + 50;
  lcd.setCursor(0,0);
  lcd.print("Counter:");
  lcd.setCursor(9,0);
  lcd.print(counter);
  return;
 }

 if ( debouncerdown.fell() ) {  // Call code if button transitions from HIGH to LOW
  lcd.clear();
  counter = counter-50;
  lcd.setCursor(0,0);
  lcd.print("Counter:");
  lcd.setCursor(9,0);
  lcd.print(counter);
  return;
 }

}

//-------------------Blink led function-------------------


void blinkLed() {
 if(currentMillis - previousMillis >= counter) {
  digitalWrite(LED_BUILTIN, !digitalRead(LED_BUILTIN));
  previousMillis = currentMillis;
 }
}


//--------------------Update Menu function--------------------

void calculateMenu() {
 if(mainMenu == true) {
 if(debouncerup.fell()){
  if(currentMenu < menuSize) {
  currentMenu = currentMenu + 1;
   }
 }
  if(debouncerdown.fell()) {
    if(currentMenu > 0) {
      currentMenu = currentMenu - 1;
    }
  }
}
}

/*--------------------Go home function--------------------

void goHome() {
  //when back button is pressed for 5 sec
  currentMenu = 1;
  submenu = initial state;
}
*/